Improvement in cooking-stoves



w. D. BARTLETT.

Cooking Stove. No. 34,871. 'Patented April 8, 1862.

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N. PEYERs Phnlouthognplur Washington. IL C.

l UNITED STATES PATENT OFFICE.

WILLIAM D. BARTLETT, OF AMESBURY, MASSACHUSETTS.

IMPROVEMENT IN COOKlNG-STOVES.

Specification forming part of Letters Patent No. 34,871, dated April 8,1862.

To all whmn' may concern.-

Beit known that 1, WILLIAM D. BARTLETT, of Amesbury, in the county ofEssex and State of Massachusetts, have invented a new and ImprovedCook-Stove; and I do hereby declare that the following is a full, clear,and exact description of the same, reference being had to theaccompanying drawings, making a part of this specification, in which--Figure 1 is a longitudinal vertical section of my invention, taken inthe line w 50, Fig. 3; Fig. 2, a transverse vertical section of thesame, taken in the line y y, Fig. 3; and Fig. 3, a horizontal section ofthe same, taken in the line .2 2, Fig. 1.

Smilar letters of reference indicate corresponding parts in the severalfigures.

The object of this invention is to obtain a cook-stove which will have amuch greater radiating-surface presented to its oven than usual, therebynot only effecting a material saving in fuel, but also insuring greaterefficiency and perfection in baking. 7

The invention consists in having the fire pot of the stove placed withinthe oven and having the latter encompassed or surrounded with finescommunicating with the fire-pot and smoke-pipe, the base on which thelatter is fitted being provided with a novel check-valve, and allarranged substantially as hereinafter fully shown and described, wherebythe desired end is attained.

To enable those skilled in the art to fully understand and construct myinvention, I will proceed to describe it.

A represents the body of the stove, which is of quadrilaterial form andhas its top plate a provided with a requisite number of potholes b, asusual. The doors 0 c of the oven are at the front side of the stove, andunderneath the stove at one side there is a chamber (1, which receives011 ash-drawer B.

C is the firepot, which is placed wholly within the oven D of the stove.This firepot may be described as being of oblong funnel shape, its lowerend passing through the bottom of the stove and communicating with thechamber (Z and consequently with the ashdrawer B, when. the latter is inits chamber d. The top of the fire-pot is equal in width and length tothe oven. The fine E at its righthand side communicates with a verticalflue Within the flue E, at the left-hand side of the fire-pot 0, thereis a vertical perforated partition-plate f, behind which a perforatedslide g is placed. The perforated plate and slide form a damper by whichcommunication may be allowed or cut off between the fines E H, asdesired. The space h between the plate f and the side of the stovecommunicates by means of an opening 1' with a flue I, which extends overthe whole surface of the back of the stove and communicates at itsrighthand lower corner with a chamber J, the upper end of which isprovided with a flange K to receive the stove-pipe. The chamber J isprovided with a vertical central partition j, which extends upwardwithin sufiiciently high to be above a door or valve L at the outer sideof the chamber. (See Fig. 2. The flue E also has a damper M within it.

The flues F H within the oven D may be described as being flat tubes,which may be nearly equal in width to the oven D, but do not require tobe of great width in their transverse section. (See Fig. 3.)

The operation is as follows: \Vhen the oven is in use for baking and allpossible heat required, the perforations in plate f are closed byadjusting the slide g. The products of combustion therefore pass alongthe flue E, down flue F into flue G, and then along into the lower endof flue H, and up flue H into space h, and thence through the opening1'. into flue I, and from flue I int-o the chamber J, and thence intothe smoke-pipe. By this arrangement it will be seen that the oven D isexposed at flve sides to a heating-surfaceto wit., at its top, bottom,two sides, and at the back besides. The fire-pot G radiates its heatentirely within the oven, as well as the two upright flues F H. TheovenD therefore will be heated very eifectually, and consequently willperform its work in a thorough manner. 'When a direct draft is required,the perforations f are opened by adjusting the slide g, and the productsof combustion pass from the fire-pot 0 direct into the space h and fromthence into flue I, the circuitous route around the oven being therebyavoided. In consequence of having the fire-pot 0 within the oven alldust is avoidedthat is. to say, prevented from escaping into the roomand the draft of the stove may be checked at any time for the purpose ofregulating the temperature of the room, the partition j compelling thecold air to ascend upward into the smoke-pipe without interfering withthe warm draft from flue I. The admission of the cold air into thesmoke-pipe checks the draft of the stove, and at the same time thepartition j allows the gases to passup into the smoke-pipe, noneescaping into the room.

The partition j in the chamber J is very essential, as it protects theflue I fromcold air, which would otherwise pass into it and reduce itstemperature, so as to prevent the escape of gases from said flue up intothe smoke-pipe. In checking the draft of a stove by the admission ofcold air into the smokepipe it is necessary that the fines of a stove benot so reduced in temperature as to prevent the escape of gases from thefire-chamber. If this result is not attained, the gases will escape intothe room the same as when an ordinary damper is used.

There is another advantage of thefire-po and flues when arranged asshown, which i is believed has not been hitherto attained, and that isthe facility of obtaining either a direct or circuitous draft. -Thisresult in a complex arrangement of flues and fire-pot inclosed within"an oven is an important feature, and so far .asI am aware a plurality ofdampers have been employed to effect the result, but only with partialsuccess.

I do not claim, broadly, admitting cold air into the smoke-pipe of astove for the purpose of checking: the draft thereof, for that has beenpreviously done; but

I do claim as new and desire to secure by Letters Patent l. The placingof the fire-pot C and fluesF H within the oven D, arranged relativelywith each other, as shown, and with the flues E G I at the top, bottom,and back of the oven, substantially as and for the purpose setforth.

2. The chamber J, communicating with the flue I and stove-pipe when saidchamber is provided with a partition j, and valve or door arranged asand for the purpose set forth.

WM. D. BARTLETT. lVit-nesses:

THOMAS I. CLARK, WM. J. BOARDMAN.

